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annotate graal/GraalCompiler/src/com/sun/c1x/ir/Compare.java @ 2861:29d33aac5ae3

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Added compare node.
author Thomas Wuerthinger <thomas@wuerthinger.net>
date Tue, 07 Jun 2011 16:16:56 +0200
parents
children 9075634c8d11 7d7cf33f8466
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1
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2 /*
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3 * Copyright (c) 2011, 2011, Oracle and/or its affiliates. All rights reserved.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 */
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24 package com.sun.c1x.ir;
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25
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26 import com.oracle.graal.graph.*;
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27 import com.sun.c1x.debug.*;
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28 import com.sun.c1x.util.*;
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29 import com.sun.cri.ci.*;
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30
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31 public final class Compare extends Value {
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32
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33 private static final int INPUT_COUNT = 2;
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34 private static final int INPUT_X = 0;
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35 private static final int INPUT_Y = 1;
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36
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37 private static final int SUCCESSOR_COUNT = 0;
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38
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39 @Override
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40 protected int inputCount() {
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41 return super.inputCount() + INPUT_COUNT;
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42 }
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43
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44 @Override
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45 protected int successorCount() {
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46 return super.successorCount() + SUCCESSOR_COUNT;
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47 }
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48
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49 /**
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50 * The instruction that produces the first input to this comparison.
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51 */
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52 public Value x() {
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53 return (Value) inputs().get(super.inputCount() + INPUT_X);
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54 }
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55
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56 public Value setX(Value n) {
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57 return (Value) inputs().set(super.inputCount() + INPUT_X, n);
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58 }
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59
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60 /**
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61 * The instruction that produces the second input to this comparison.
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62 */
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63 public Value y() {
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64 return (Value) inputs().get(super.inputCount() + INPUT_Y);
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65 }
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66
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67 public Value setY(Value n) {
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68 return (Value) inputs().set(super.inputCount() + INPUT_Y, n);
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69 }
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70
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71 Condition condition;
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72 boolean unorderedIsTrue;
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73
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74 /**
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75 * Constructs a new If instruction.
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76 * @param x the instruction producing the first input to the instruction
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77 * @param condition the condition (comparison operation)
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78 * @param y the instruction that produces the second input to this instruction
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79 * @param graph
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80 */
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81 public Compare(Value x, Condition condition, Value y, Graph graph) {
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82 super(CiKind.Illegal, INPUT_COUNT, SUCCESSOR_COUNT, graph);
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83 assert (x == null && y == null) || Util.archKindsEqual(x, y);
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84 this.condition = condition;
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85 setX(x);
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86 setY(y);
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87 }
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88
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89 /**
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90 * Gets the condition (comparison operation) for this instruction.
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91 * @return the condition
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92 */
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93 public Condition condition() {
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94 return condition;
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95 }
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96
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97 /**
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98 * Checks whether unordered inputs mean true or false.
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99 * @return {@code true} if unordered inputs produce true
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100 */
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101 public boolean unorderedIsTrue() {
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102 return unorderedIsTrue;
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103 }
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104
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105 /**
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106 * Swaps the operands to this if and reverses the condition (e.g. > goes to <=).
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107 * @see Condition#mirror()
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108 */
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109 public void swapOperands() {
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110 condition = condition.mirror();
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111 Value t = x();
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112 setX(y());
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113 setY(t);
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114 }
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115
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116 @Override
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117 public void accept(ValueVisitor v) {
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118 }
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119
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120 @Override
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121 public void print(LogStream out) {
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122 out.print("comp ").
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123 print(x()).
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124 print(' ').
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125 print(condition().operator).
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126 print(' ').
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127 print(y());
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128 }
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129
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130 @Override
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131 public String shortName() {
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132 return "Comp " + condition.operator;
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133 }
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134
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135 @Override
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136 public Node copy(Graph into) {
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137 Compare x = new Compare(null, condition, null, into);
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138 x.unorderedIsTrue = unorderedIsTrue;
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139 return x;
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140 }
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141 }